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112 lines
3.9 KiB
C++
112 lines
3.9 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2017 - ROLI Ltd.
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JUCE is an open source library subject to commercial or open-source
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licensing.
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By using JUCE, you agree to the terms of both the JUCE 5 End-User License
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Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
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27th April 2017).
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End User License Agreement: www.juce.com/juce-5-licence
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Privacy Policy: www.juce.com/juce-5-privacy-policy
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Or: You may also use this code under the terms of the GPL v3 (see
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www.gnu.org/licenses).
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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#include "../DSPDemo.h"
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//==============================================================================
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// @@ START_DEMO
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struct OscillatorDemo
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{
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void prepare (const ProcessSpec& spec)
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{
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gain.setGainDecibels (-6.0f);
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for (auto&& oscillator : oscillators)
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{
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oscillator.setFrequency (440.f);
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oscillator.prepare (spec);
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}
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updateParameters();
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tempBuffer = AudioBlock<float> (tempBufferMemory, spec.numChannels, spec.maximumBlockSize);
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}
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void process (const ProcessContextReplacing<float>& context)
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{
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tempBuffer.copy (context.getInputBlock());
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tempBuffer.multiply (static_cast<float> (fileMix));
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oscillators[currentOscillatorIdx].process (context);
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context.getOutputBlock().multiply (static_cast<float> (1.0 - fileMix));
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context.getOutputBlock().add (tempBuffer);
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gain.process (context);
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}
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void reset()
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{
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oscillators[currentOscillatorIdx].reset();
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}
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void updateParameters()
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{
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currentOscillatorIdx = jmin (numElementsInArray (oscillators),
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3 * (accuracy.getCurrentSelectedID() - 1) + (typeParam.getCurrentSelectedID() - 1));
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auto freq = static_cast<float> (freqParam.getCurrentValue());
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for (auto&& oscillator : oscillators)
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oscillator.setFrequency (freq);
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gain.setGainDecibels (static_cast<float> (gainParam.getCurrentValue()));
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fileMix = mixParam.getCurrentValue();
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}
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//==============================================================================
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Oscillator<float> oscillators[6] =
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{
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// No Approximation
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{[] (float x) { return std::sin (x); }}, // sine
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{[] (float x) { return x / MathConstants<float>::pi; }}, // saw
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{[] (float x) { return x < 0.0f ? -1.0f : 1.0f; }}, // square
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// Approximated by a wave-table
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{[] (float x) { return std::sin (x); }, 100}, // sine
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{[] (float x) { return x / MathConstants<float>::pi; }, 100}, // saw
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{[] (float x) { return x < 0.0f ? -1.0f : 1.0f; }, 100} // square
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};
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int currentOscillatorIdx = 0;
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Gain<float> gain;
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ChoiceParameter typeParam { {"sine", "saw", "square"}, 1, "Type" };
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ChoiceParameter accuracy { {"No Approximation", "Use Wavetable"}, 1, "Accuracy" };
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SliderParameter freqParam { { 20.0, 24000.0 }, 0.4, 440.0, "Frequency", "Hz" };
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SliderParameter gainParam { { -100.0, 20.0 }, 3.0, -20.0, "Gain", "dB" };
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SliderParameter mixParam { { 0.0, 1.0 }, 1.0, 0.0, "File mix" };
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HeapBlock<char> tempBufferMemory;
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AudioBlock<float> tempBuffer;
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double fileMix;
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std::vector<DSPDemoParameterBase*> parameters { &typeParam, &accuracy, &freqParam, &gainParam, &mixParam };
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};
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// @@ END_DEMO
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RegisterDSPDemo<OscillatorDemo> oscillatorDemo ("Oscillator", BinaryData::OscillatorDemo_cpp);
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